Data Sheet

LM431A / LM431B / LM431C — Programmable Shunt Regulator
© 2003 Fairchild Semiconductor Corporation www.fairchildsemi.com
LM431A / LM431B / LM431C Rev. 1.2.0 7
Typical Application
Figure 12
.
Shunt Regulator
Figure 13. Output Control for Three-
Terminal Fixed Regulator
Figure 14. High-Current Shunt
Regulator
Figure 15. Current Limit or Current Source
Figure 16. Constant-Current Sink
V
O
1
R
1
R
2
-------+



V
ref
=
LM431
V
O
V
ref
1
R
1
R
2
-------+



=
LM431
V
O
1
R
1
R
2
-------+



V
ref
=
LM431
LM431
LM431